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#!/usr/bin/python3
# Copyright (c) 2015, Ralf Jung <post@ralfj.de>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#==============================================================================
# This is the hook called by GitHub as webhook. It updats the local repository, and then all the other mirrors.
import sys, traceback, json
from git_mirror import *
def get_github_payload(repo, signature):
'''Return the github-style JSON encoded payload (as if we were called as a github webhook)'''
data = sys.stdin.buffer.read()
verify_signature = repo.compute_hmac(data)
if signature != "sha1="+verify_signature:
raise Exception("You are not GitHub!")
try:
data = json.loads(data.decode('utf-8'))
return data
except ValueError:
return {} # nothing read
if __name__ == "__main__":
# call this with: <reponame> <event name> <signature>
repo = None # we will try to use this during exception handling
try:
repos = load_repos()
if len(sys.argv) < 4:
raise Exception("Usage: {} <reponame> <event name> <signature>".format(os.path.basename(sys.argv[0])))
reponame = sys.argv[1]
githubEvent = sys.argv[2]
githubSignature = sys.argv[3]
if reponame not in repos:
raise Exception("Repository {} missing or not found.".format(reponame))
repo = repos[reponame]
# now sync this repository
data = get_github_payload(repo, githubSignature)
if githubEvent == 'ping':
# github sends this initially
print("Content-Type: text/plain")
print()
print("Pong!")
sys.exit(0)
elif githubEvent == 'push':
ref = data["ref"]
oldsha = data["before"]
newsha = data["after"]
# validate the ref name
if re.match('refs/[a-z/]+', ref) is None:
raise Exception("Invalid ref name {}".format(ref))
# collect URLs of this repository, to find the mirror name
urls = []
for key in ("git_url", "ssh_url", "clone_url"):
urls.append(data["repository"][key])
mirror = repo.find_mirror_by_url(urls)
if mirror is None:
raise Exception("Could not find the mirror.")
stdout = repo.update_ref_from_mirror(ref, oldsha, newsha, mirror, suppress_stderr = True)
# print an answer
print("Content-Type: text/plain")
print()
print("Updated {}:{} from mirror {} from {} to {}".format(reponame, ref, mirror, oldsha, newsha))
print(stdout)
else:
raise Exception("Unexpected github event {}.".format(githubEvent))
except Exception as e:
if repo is not None:
repo.mail_owner("There was a problem running the git-mirror webhook:\n\n{}".format(traceback.format_exc()))
# do not print all the details
print("Status: 500 Internal Server Error")
print("Content-Type: text/plain")
print()
print("git-mirror: We have a problem:\n{}".format('\n'.join(traceback.format_exception_only(type(e), e))))
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